134 THE NAUTILUS. 



The Scammon Lagoon specimens are more grayish than those from 

 San Diejro. 



The nearest ally to this species is the shell figured by Marrat in 

 the Thesaurus, plate 350, figure 419, under the name of anazora 

 Duclos. This, judging by the figure, is a much smaller and some- 

 what stouter shell, with less distinct marliings. The shell repre- 

 sented by figure 411 on the same plate is that identified by Dr. Car- 

 penter and H. Cuming for the Smithsonian collection as 0. anazora 

 Duclos, though it is named 0. pidla by Marrat. The heavy white 

 callus on the body extending beyond the suture amply distinguishes 

 it from 0. porleri. 1 have not access to Duclos' original paper and 

 hence cannot resolve the doubt as to which is Duclos' anazora. 



The previously known Calil'ornian OlivcHae were none of them of 

 remarkable beauty, though some of the Gulf species are very attrac- 

 tive, but the present form is one of the prettiest shells of the coast. 

 It may be that its range extends further north. 



POMAULAX TURBANICLS n. Sp. 



Shell moderately large, rather thin, brilliantly pearly inside, 

 covered with a reddish brown periostracum which becomes oliva- 

 ceous on the base ; form rather depressed, with turgid whorls, about 

 six in all, the nucleus white, blunt, imperfect ; base flattened, 

 bordered by a s|)arsely nodulous carina; sculpture on the spire of 

 slightly protractive, rounded, short, rather elevated rihlets reaching 

 about half way forward on the whorl from the suture (17 on the last 

 whorl), ending in or barely separated from the same number of stout 

 nodules at the periphery, with a marked sulcus separating them from 

 a similar row of nodules on the margin of the base ; base with four 

 somewhat undulated spiral ridges separated by subequal interspaces, 

 excf^pt the inner pair which are smaller and closer to each other; 

 base imperforate, swollen at the base of the pillar ; ajjerture ample;, 

 surface of the body erased, leaving visible pearly and white sub- 

 stance ; the pillar arcuate, pearly ; with no anterior prominence or 

 tooth ; outer lip and base simple, sharp ; operculum white, rounded,, 

 shelly, with three partly gyrate, very prominent, granose, narrow 

 ribs, the spaces between theni excavated and smooth. Height of 

 shell 37.') ; of last whorl 30.0 ; of aperture (vertical) 21.5 ; max. 

 diameter 41.0 mm. 



U. S. Fish Commission station 21189, in 3G fathoms, coral, off 

 Magdalena Bay, Lower California. U. S. Nat. Mus. 111242. 



