274 



SCIENCE 



[N. S. Vol. XXXIII. No. 842 



peared, the stomodiEal and proctodaeal invagina- 

 tions are formed at or near tlie places of forma- 

 tion of the mesenteron rudiments. The rudiments 

 of the mesenteron at their inception are thus 

 sharply marked off from the blastoderm of the 

 middle plate (mesoderm) on the one hand, and 

 the epithelium of the proetodseum and stomodaeum 

 (ectoderm) on the other. These observations are 

 in close accord with those of Carrifere and Burger 

 on Ohalioodoma. 



The so-called blastopore and the yolk plug 

 described by Dickel (1904) for the honey bee 

 have been observed; but the writer can not eon- 

 firm this investigator's conclusions relative to 

 these structures. The yolk plug, which Dickel 

 thought connected with the formation of the 

 mesenteron, was found in the same sagittal sec- 

 tion with the true anterior mesenteron rudiment, 

 the one on the dorsal, the other on the ventral 

 surface of the egg, thus demonstrating that no 

 close genetic relationship exists between them. 

 The origin and fate of this so-called yolk plug is 

 obscure, but it is a transitory structure, of very 

 brief duration, possibly a vestigial organ. 



Birds of the Olympic Peninsula: Albert B. 



Eeagan, U. S. Indian Service. 



The Olympic Peninsula, Washington, extends 

 from Grays Harbor on the Pacific coast north to 

 the Strait of Juan de Fuca and east to the 

 "sound." So far as the habitation of birds is 

 concerned, the region divides itself into three 

 parts — the coast strip, the mountains and the 

 islands off the coast. 



The coastal strip ranges from twelve to thirty 

 miles in width. The central, high section is a 

 circular area forty miles in circumference in the 

 east central part of the peninsula, ranging from 

 6,000 to 8,000 feet in height, with a declining 

 ridge extending northwestward to Cape Flattery. 

 The whole mainland area, except in the high 

 mountain districts, is heavily forested and covered 

 with a dense underbrush so that near the coast 

 it approaches the jungle state. For this reason 

 birds in this division are hard to find, as they 

 can so easily seclude themselves; but at the beach 

 line and in the island districts they are in evi- 

 dence. 



The land species generally met with are: north- 

 western crow (Corvus caurinus) , northern raven 

 ( C. coratB principalis ) , desert sparrow hawk 

 (Falco sparverius phalwna) , black cloud swift 

 (Gypseloides niger icn-eaUs) , American crossbill 

 (Loxia curvirostra mvnor) , Audubon warbler 

 (Dendroioa audubon) , rough-winged swallow 



(Selgidopteryx serripenn-is) , rufous hummer 

 (Selasphorus fufus), rusty song sparrow (Melo- 

 spiza cinera morphna) , sooty song sparrow (Pas- 

 serella iliaca (fuUginosa) ), bald eagle (Haliaetus 

 leucocephalus) , black merlin (Falco columbarius 

 sucJclryi) , Peale falcon (Falco peregrinus pealei) , 

 harlequin duck (Eistriontous histrionicus) , ruddy 

 turnstone (Arenaria morienella) , Hudsonian cur- 

 lew ( Numenius hudsonious ) , northern phalarope 

 (Phalaropus lohatus) , barn swallow (Hirundo 

 erythrogaster) , western winter wren (Olbiorchilus 

 kiemalis paoificus), pectoral sandpiper (Acto- 

 dromas maculata) , western sandpiper (Ereunetes 

 ocoidentalis) , lutescent warbler (Helminthophila 

 celata lutescens) , russet-backed thrush (Hylo- 

 cichla ustulata) , yellow warbler (Dendroica 

 (Estiva), black turnstone (Arenaria melano- 

 cephala) , semi-palated plover (JEgialitis semi- 

 palmata) , knot (Tringa canutus), wandering 

 tatler (Beteractitis incanus) , yellow legs (To- 

 tanus flavipes ) , also several species of ducks and 

 geese ( in migration ) . 



It is the writer's opinion that there are 25,000 

 land birds in the peninsula. 



The islands are principally on the Pacific side 

 and there parallel with the coast, extending from 

 the mainland only a few miles seaward at most. 

 They number something like 100 points, rocks, 

 pillars and islands proper. By position, they 

 naturally divide themselves into three groups. 

 These groups were each made a bird reserve by 

 President Theodore Roosevelt and designated as 

 follows: Copalis Rock Reserve, near Granville 

 (Tahola), thirty miles north of Grays Harbor; 

 the Quillayute Needles Reserve, in the vicinity 

 of LaPush, Washington, and the Flattery Rock 

 Reserve, including all the rocks and islands from 

 the Ozette Indian village to the entrance of the 

 Strait of Fuca. 



These islands fairly swarm with birds. The 

 species most commonly observed are: western gull 

 (Larus occidentalis), glaucus- winged gull (L. 

 glaucescens) , Heerman gull (L. Beermani) , 

 marbled murrlet ( Brachyramphus marmoratus ) ,' 

 Califoraia murre (Vria troile calif ornioa) , black 

 oyster catcher (EcEmatopus hachmani) , loon 

 (Gavia irriber) ,- white-winged scoter (Oidemia 

 deglandi) ,- tufted puiHn (Lunda mrrhata) , pigeon 

 guillemot (Cepphus columba) , dark-bodied shear- 

 water (Puffinus grise^i-s),' surf scoter (Oidemia 

 perspieillata) ,' Cassin auklet (Ptychoramphus 

 aleutious ) , rhinoceros auklet ( Gerorhinca mono- 

 cerata) , American scoter (Oidemia amierioana) ,' 



' Migratory. 



