July 13, 1917] 



SCIENCE 



47 



An analysis of the cranial ganglia in Squalus 

 acanthias: Sally P. Hughes. (Illustrated with 

 lantern.) 



This analysis confirms the results of Strong 

 (1903) and Landacre (1916). The trigeminus 

 ganglion is constricted into a ventral maxillaris 

 and a dorsal mandibular and superficial ophthalmic 

 portion; the ophthalmicus profundus has a distinct 

 ganglion. The facialis comprises the geniculate 

 ganglion, a motor root distributed through the 

 hyomandibular trunk, and three lateral line gang- 

 lia — a buccal, a superficial ophthalmic VII., and a 

 third out in the hyomandibular trunk — the fibers 

 from the last two forming the dorsal lateral line 

 root, those from the buccal, the ventral. The audi- 

 tory ganglion is distinct, rising by a large root 

 just ventral and posterior to the lateral line roots 

 of the VII. The IX. ganglion is visceral sensory 

 with a smaU lateral line ganglion in its anterior 

 end. The lateral line fibers rise by a small sepa- 

 rate root just barely in contact dorsally with the 

 lateral line root of the X. The vagus rises by a 

 large anterior lateral line root followed by a suc- 

 cession of visceral sensory and motor roots. There 

 are three lateral line ganglia on the X., almost 

 fused together. A small general cutaneous element 

 13 given off with fibers from the first two of these. 

 The visceral ganglia are also slightly segmented 

 into four branchial and one intestinal portion, the 

 last two quite inseparable. The cervical plexus, 

 comprising the two occipitals and first three spinal 

 nerves, is in contact with the vagus, but entirely 

 distinct from it. 



The eyeball and associated structures in the 'blind- 

 worms: H. W. NoREis. (Illustrated with lan- 

 tern.) 



The optical apparatus in the Cceeilians under- 

 goes various degrees of degeneration and trans- 

 formation, from a condition where the entire 

 mechanism is present, but in a rudimentary condi- 

 tion, to that where only a vestigial eyeball and 

 much modified and transformed retractor and 

 levator bulbi muscle are present. 



Bermuda as a type collecting ground for inverte- 

 brates: H. A. Cross, Jr. 

 White grub outbreaks in northeastern Iowa: R. L. 

 Webster. 



A brief account of the destructive outbreaks of 

 white grubs in northeastern Iowa in 1912 and 

 1915; the relation of the contour of the land and 

 the abundance of timber to these outbreaks; the 

 prospects for damage in the near future. 



The influence of the male on litter size: Edward N. 



Wentworth. 

 Entomostraca of northwestern Iowa: F. A. 



Strom STEN. 



The following is a list of Entomostraca collected 

 in the neighborhood of the Macbride Lakeside Lab- 

 oratory, Lake Okoboji, Iowa, during August, 1916 

 Sida crystallina, Daphnia hyalina, Daphnia Tcalil 

 bergensis, Daphnia Scapholebris muoronata, Simo 

 cephalus vetulus, Simocephalus serrulatus, S. ameri 

 cana, Bosmina longirostris, Camptocercus macru- 

 rus, Alonella excisa, Pleuroxus stramineus, P. 

 hamatus, P. denticulatus, P. procurvus, Diaptomus 

 sicilis, D. signicauda, D. oregonensis, D. clamipes, 

 D. pallidus, Cyclops signatus var. coronatus, C. s. 

 var. tenucornis, C. insignis, C. serrulatus, C. macru- 

 rus, C. fluviatilis, C. affinis, C. bicolor, C. phaleratus, 

 C. fimbriatus. 



The development of the music gland in the logger- 

 head turtle: Frank A. Stromsten. 



Some new endoparasites of the snalce: Thesle T. 



Job. 



Porocephalus globicephalus Hett; the characters 

 of the male, which Hett did not have in describing 

 the species, are recorded and additional notes on 

 the habits and anatomy of both sexes offered. 



A distonie, Benifer sp?, closely aUied to B. 

 ellipticus Pratt. Measurements of the specimens 

 recorded. 



LarvEB of Acanthocephalia, Gigantorynchus sp?, 

 larval condition described. 



Further notes on the venous connections of the 

 lymphatic system in the common rat: Thesle T. 

 Job. 



In addition to the portal, renal and ilio-lumbar 

 vein communications reported in 1915, an inferior 

 vena caval communication at the level of the lum- 

 bar nodes has been demonstrated. The variable 

 occurrence of the communications and the lack of 

 correlation of these taps is shown. The possible 

 effect of the physiological condition of the animals 

 and of the injecting technic on the demonstration 

 of the communications is suggested. Conclusions 

 as to the significance of the communications are 

 delayed until the embryological study now iu 

 progress is completed. 



Mites affecting the poison oalc : H. E. Ewing. 

 The Odonata of Iowa: Lloyd Wells. 

 Observations on tlie Protozoa, with descriptions 



and drawings of some probable new species: 



Clementina S. Spencer. 

 Notes on some Iowa rodents: Dayton Stoner. 



A brief progress report of some work now under 



