154 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



and Mr. Doyer in invcsti.uatiiiii (lie embryol()<;y of a coimiioii iiiiiiiiow 

 {Fundulns hcttroclitus). 



Mr. B. n. Waters and Mr. C. W. Stevens, of Princeton College, j^ave 

 their attention to inquiries of a general character, Avliile Prof. A. A. 

 Wriolit and Mr. M. J. (rroennian, wlio were in attendance for only a 

 sliort time, were occupied in S'icuring miscellaneous collections of marine 

 animals for Oberliu Collej;e and the University of Pennsylvania, 

 resi)ectively. 



SUMMER OF 1890. 



During the summer of 1800 Prof. P. II. Ilerrick continued his inves- 

 tigations, begun the previous year, respecting- the life history of the 

 lobster. Prof. 11. C. Bumi^us, of Brown University, was also present 

 during the spring months and gave attention to the same siiecies, 

 his studies having special reference to the length of time the eggs are 

 carried by the parent lobster before hatching. Mr. R. G. Harrison and 

 Mr. J. L. Kellogg, of Johns Hopkins University, worked conjointly on 

 several problems relative to the habits and iixation of oyster spat, and 

 the latter also took up the study of the anatomy and life history of sev- 

 eral bivalve mollusks, including the more common edible species, such 

 as the quahog, soft clam, scallop, .and mussel. Mr. George H. Field, 

 also of Johns Hopkins University, continued the inquiries commenced 

 by Prof. Brooks in 1889 on the development of starfishes, and extended 

 his observations to other species of echinoderms. Mr. E. G. Conkliu, 

 of the same institution, studied the embryology of Urosalpinoc and Grepi- 

 (lula, two gastroi)od mollusks, of which the former is the so-called oyster 

 drill, second only to the starfish as to the amount of damage which it 

 infiicts upon the oyster-beds of southern New England. 



Dr. E. A. Andrews investigated the structure and development 

 of the eyes of annelid worms, and the growth of a small nemertean 

 [MecTcelia). Dr. E-. P. Bigelow, who was attached to the schooner 

 Grampufi, in addition to the i)hysical observations assigned him, made 

 large (collections of surface animals in the region of the Gulf Steam, 

 which occupied his attention while the vessel was in port. I'rof. Wil- 

 liam Patten, of the University of North Dakota, was interested in the 

 study of the sense organs of crustaceans and of the horseshoe crab, 

 and Mr. W. McM. Woodworth continued his observations upon the 

 parasitic planarian which lives on the gills of the latter species. The 

 development of teleostean fishes was studied by Dr. Thomas G. Lee, of 

 Yale University, and general inquiries were carried on by Mr. W. C 

 Prime, of Princeton College. 



